another beta image release

[Andreas29]

I have just added the tacking functionality to the web interface (and created a 'pull request' for this)

The tack function is also working in de OpenCPN plugin, however in 'wind'-modus the direction seems wrong (starboard instead of port and vice versa)

Hi,

thank you for your work. 
Do you know if it works on a OC-raspberry system too? 
As I wrote here: Tack functionality does not work for me (openmarine.net)
The modified tacking.py does not work when running OC on a raspberry system. Onno made the same experience. It works when running OC on a windows system.

Best regards

Andreas